Hedley. — Results of Dredging. 71 



This species was first described from New Zealand, pro- 

 bably from Strange's collection, but has never been recognised 

 again, either there or elsewhere, and was eliminated from the 

 New Zealand list bv Hutton (P.L.S.N.S.W., ix, 1884, p. 

 527). 



Poroleda lanceolata, Hutton. Plate II, fig. 7. 



Scaphula(?) lanceolata, Hutton, Trans. N.Z. Inst., xviii, 1885, 

 p. 332. Poroleda lanceolata, Hutton, Macleay Memorial 

 Vol., 1893, p. 86 (not Poroleda lanceolata, Tate, Proc. Roy. 

 Soc. N.S.W., xxvii. 1834, p. 186= Poroleda tatei, Hedley, 

 " Victorian Naturalist," xxi, Dec. 1904, p. 112). 



The name of this species is involved in some confusion. 

 Professor Tate, in March, 1894, introduced a new species, 

 type of a new genus, under the title of Poroleda lanceolata. 

 But in the previous September Captain Hutton had rede- 

 scribed his fossil under the same name. Since Poroleda lan- 

 ceolata was in current use for both the New Zealand and the 

 Australian shell, I have proposed to distinguish that which 

 Tate figured and described from the Gellibrand River beds of 

 Victoria as Poroleda tatei. 



In colour, texture, and all particulars save those of the 

 hinge-teeth this species closely resembles Leda ensicula, 

 Angas, L. lefroyi, Beddome, and L. huttoni, Tate. These five 

 species might suitably be included in Poroleda. 



Hitherto P. lanceolata has been known only as a Ter- 

 tiary fossil. Mr. A. Hamilton has shown me a broken valve 

 from off Anchor Island, Dusky Sound. In our 110 fathoms 

 dredging it occurred plentifully. The size of the specimen 

 drawn is— height, 3 - 85 mm. ; length, 13 - 8 mm. ; breadth of 

 single valve, 0-9 mm. 



Malletia australis, Quoy and Gaimard. 



Solenclla australis, Quoy and Gaimard, Voy. " Astrolabe," 

 Zool., hi, 1835, p. 471, pi. 78, f. 5-10. 



A single valve. 



Bathyarca cybaea, n. sp. Plate I, figs. 3, 4. 

 Shell small, oblong, short and inflated, inequivalve, a little 

 inequilateral without impressed ray, posteriorly and anteriorly 

 rounded, sinuate beneath the beak. Colour white, probably 

 bleached. Sculpture finely reticulate. A series of delicate 

 subequal evenly spaced riblets radiate from the umbo to the 

 margin ; as growth proceeds new riblets are intercalated till 

 about fifty reach the margin. The radii are broken into short 

 lengths by concentric growth -lines which produce minute 

 prickles at the point of intersection. Beak much inrolled, at 

 a third of the length of the shell. Ligamental area narrow. 



